▎ 摘　　要

An electrochemical sensor for detection of three monohydroxylated polycyclic aromatic hydrocarbons (OH-PAHs) was fabricated by electrochemical reduction of graphene oxide (E-rGO) on screen-printed electrode (SPE). The E-rGO film presents typical wrinkled structure with porous and cavity-like nanostructure, providing large surface area, effective pi-electron system and high electrical conductivity. The developed E-rGO/SPE sensor exhibits outstanding sensing performance for the target OH-PAHs, 2-hydroxynaphthalene, 3-hydroxyphenanthrene, and 1-hydroxypyrene, within a linear range varying from 50-800 nM, 50-1150 nM, and 100-1000 nM, and with a limit of detection (LOD) of 10.1 nM, 15.3 nM, and 20.4 nM (S/N=3), respectively. The electrochemical sensor possesses excellent stability, acceptable reproducibility, and good anti-interference ability. Additionally, the proposed sensor can be applied to the analysis of OH-PAHs in the urine samples with recoveries of 98.1-105.9 %.